Jar-molding machine.



W. LEWIS.

JAR MOLDING MACHINE.

APPLICATION FILED APR-22, 1914;

1 182,390-. Patented May 9,1916.

A M 'filig A A? E ii A3 5: B B 0 P M U I E4 E4 0 I may [K I M Fig.4 I J// J2 a R P E 4 R Y N/ l/i/f/Vf a i F I L4 1 1 F r ATTORNEY WILFRED LEWIS, OF HAVERFORD, PENNSYLVANIAQASSIGNOR TO THE TABOR MANU- FACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

JAR-MOLDING MACHINE.

Specification of Letters Patent.

Patented May 9, 1916.

Application filed Aprilfi z, 1914. Serial No. 833,591.

My present invention relates to jar mold-V ing machines, and has for its primary purpose to provide a jar molding machine with simple and effective lubricating means especially adapted for injecting lubricating material at the pro-per rate into the cylinder of the piston and cylinder connection commonly employed between the anvil and mold support of such a machine.

To accompli h he object of my invention I have devised a pump, comprising a casing formed with a working cylinder which I attach to the mold support of the ar molding I machine, and having a plunger working in said cylinder and caused by its own inertia to make a working stroke each time the mold support collides with the anvil in the regular operation of the machine.

The various features of novelty characterizing my invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, and of the advantages possessed by it,

reference should be had to the accompanying. drawings and, descriptive matter in which I have illustrated and described one form in which my invention may be embodied.

Of the drawings: Figure 1 is an elevation with parts broken away and in section of a jar molding machine provided with my im proved cylinder lubricating means, Fig. 2 is a plan view of the lubricating pump ;'Fig. 3 is a section taken on the line 83 of Fig. 2; and Fig. 4 is an elevation .of the pump with the portion of the molding machine to which it is directly afiixed shown in section.

In the drawings, I have illustrated the use of my improvement in connection, with a jar molding machine of the so called shockless'type and of the particular con struction illustrated by my prior Patent 1,055,836, granted March11,-1918. I In this machine, as shown in Fig. '1, A represents the mold support, B the floating anvil, and C the stationary base of the machine. The mold support A is formed with a cylinder space A in which the piston extension B of the anvil works.

D represents the valve mechanism controlling the admission to', and exhaust from the cylinder space A of the compressed air or other pressure fluid employed to bring about the movement of separation between the mold support and anvil preparatory to each movement of approach terminating in collision. I

The inertia pump E, which must be suitably secured to the mold support, is attached,

as shown, to one of the vertical ribs. or webs A forming a part of the mold supporting structure A, and rests at its bottom against the flange A which forms the striking end or hammer portion proper of the mold support. As shown, the pump E comprises a cup-shaped casing or housing formed with threaded sockets E in one side into which are screwed the bolts F emploved to attach the pump to the web A Adr antageously, a somewhat yielding pad G, formed advantageously of type metal, is interposed between the pump housing and the portions A and A of the mold support to which it is secured.

F, F. represent spring lock washers, employed to prevent the bolts F from working loose in the operation ofthe machine. The otherwise open upper end of the pump housing is closed I by a member E which is formed on itsunder side with a projection extending nearly to the bottom, of, but, not filling the main housing. The member E is secured to the housing by bolts FA and lock washers FA. In the member E is formed a vertical chamber comprising coaxial portions E E and E of progressively decreasing diameters. The section E communicates at its lower end with a chamber or space E also formed in i the member E A ported valve seat member H is screwed into an opening E in the wall of the chamber E The port through the member H is normally closed by a ball valve I, which is adapted to lift, however, when the pressure in thechamberE is reduced,to

' permit oil to pass into the chamber E from the reservoir formed by space 6 between the inner wall of the housing and the member E iAn upward extension E from the chamber E is connected by the pipe M to the interior of the cylinder A at the upper end of the latter. At the upper end of the channel E proper, the latter is enlarged to provide a chamber for a ball valve J and the spring K acting on the valve and aiding the latter in preventing back flow from the pipe M into the chamber E The chambers E and E receive the head L and body L, respectively, of the upper weight form ing extension of the pump plunger L proper. The latter works in the chamber E A spring N interposed between the plunger head L 'and'the bottom of the chamber E, tends to hold the plunger in the position in which the head L engages the adjustable stop formed by the bolt 0 which passes through the threaded socket formed in the block P screwed into and closing the threaded upper end of the chamber E The reservoir space a surrounding the member E is supplied with oil from time to time through the filling connection Q, which is closed at its outer end by the threaded plug R. The latter is formed with a somewhat restricted air vent or pressure equalizing passage R. Grooves or channels L are formed through the body portion L of the plunger in order to place the chamber E in free communication with the lower end of the chamber E In operation, each time the mold support falls into collision with the anvil B, the inertia of the plunger L causes the latter to be carried downward from its upper position, shown in Fig. 8. This causes oil to I be forced out of the chamber E through the extension E thereof and pipe M into the cylinder A.

As soon as the downward movement of the maximum possible stroke of the plunger L,

may be regulated to meet the conditionsof operation by adjusting the stop 0. The

7 spring N may be light enough so that the plunger L will'make it full stroke on each collision in regular operation, regardless of the considerable variation which may occur in the intensity of collision. However, in practice, I prefer to employ a spring of such a strength and character that the effective stroke of the plunger L will vary in more I or less close approximation to the velocity v of the mold support at the moment" of im pact. The velocity of the mold support a impact corresponds generally to the distance by which the mold support and anvil are '9 separated preparatory. to collision, and the need for lubricating oil in the cylinder will obviously depend not only upon the number of strokes made by the piston, but also able to adjust the stop 0 to correspond to the particular conditions of operation when the machine is operated for considerable periods with strokes of a substantially uniform character. 7

While in accordance with the provisions of the statutes I have illustrated and described the best form of my invention now known to me, it will be apparent to those skilled in the art that changes may be made in the form of apparatus disclosedwithout departing from the spirit of my invention and that under some conditions certain features of my invention may be used without a corresponding use of otherfeatures.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is: V 1 p 1. A lubricating pump comprising a cas ing adapted to be attached to a reciprocating part and formed with a pump chamber and a plunger chamber extending parallel to the direction of movement of said reciprocating part and-opening at one end to saidpump chamber, a plunger mounted in said plunger chamber, and means tending to hold said plunger at one end of its movement in said chamber but yielding to permit the plunger to be moved out of said position by its inertia when a corresponding movement of said reciprocating part is suddenly checked, and valves controlling the admission into and discharge from said pump chamber of lubricatingmaterial. a

2. A lubricating pump comprising a casing adapted to be attached to areciprocating part and formed with a pump chamber and a plunger chamber extending parallel to the direction of movement ofsaidreciprocating part and comprising an enlarged portion and a reduced portion connecting said enlarged portion to said pump chamber, a plunger comprising a weight, form ing portion working in said enlarged chamber portion, and a restricted portion working in said restricted chamber portion, re-

silient means acting on I said plunger and tending tohold the latter in a retracted poition from which the plunger is moved by ts inertia on a sudden decrease inthe moqtion in a correspondingdirection of said re- 01PI'OCat1I1g part, and valves controlling the 1:0

admission into and discharge from said chamber of lubricating material.

3. The combination with the relatively movable mold support and anvil of a jar molding machine of a lubricating'pump secured to said mold support and formed with a chamber and a plunger adapted to be moved into said chamber by its inertia at each collision, means for causing a return movement of the plunger and valves controlling the admission into and discharge from said chamber of lubricatingmaterial.

4. The combination with the relatively movable mold support and anvil of a jar molding machine, of lubricating means for said machine comprising a pump attached to said mold support and comprising a movable plunger adapted to be moved through a working stroke by its own inertia on each collision of the mold support and anvil, and means yielding to permit said stroke but operative to cause the plunger to make its return stroke after each collision.

5. The combination with the relatively movable mold support and anvil members of a jar molding machine, of lubricating means for said machine comprising an inertia pump attached to one of said members and consisting of a chambered external housing or casing, a chambered member extending into said housing but not filling the chamber space therein, said member being provided with a pumping chamber and with a valved inlet thereto from the space in said housing not filled by said member and with a valved outlet therefrom and with a passage opening into said chamber,

a plunger comprising a portion fitting in said passage and movable therein, and means tending to hold said plunger in a retracted position with reference to said chamber but yielding to permit it to be moved toward said chamber by its own inertia on each collision of said mold support and anvil.

6. The combination with the relatively movable mold support and anvil members or a jar molding machine, of lubricating means for said machine comprising an in ertia pump attached to one of said members and consisting of a chambered external housing or casing, a chambered member extending into said housing but not filling the chamber space therein, said member being provided with a pumping chamber and with a valved inlet thereto from the space in said housing not filled by said member, and with a valved outlet therefrom, and with a passage opening into said chamber, a plunger comprising a portion fitting in said passage and movable therein and another weight increasing portion of larger diameter than the portion entering said passage and means tending to hold said plunger in a retracted position with reference to said chamber but yielding to permit said plunger to be moved toward said chamber by its own inertia on each collision of said mold support and anvil.

VVILFRED LEWVIS.

lVitnesses ARNOLD KA'rz, D. STEWART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. c." 

